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Tag Archive: transistor

Very often when designing some stuff I need a square wave signal generator with variable pulse width and frequency to control power MOSFETS. You can use such a tool when designing DC-DC converter or switch-mode power supply, you can use it to emulate PWM from microcontroller when developing some new embedded design, or maybe you …

In this article I will tell you how to get shorter relay switching times and how to minimize relay current consumption. The same exact things apply to solenoids and solenoid valves. Usually if you want to control relay from microcontroller you would do something like this:

My parents growing their own organic food and they asked me to deal with winter temperatures problem in the storage room. It gets really cold here, in Ukraine. Some winters have even lower temperatures than -30°C (-22°F). So right now I designing a simple thermostat for keeping temperature at about 5-7 degrees C above zero. …

In this video I’ll tell you what is darlington transistors, how to use them to switch medium current loads with microcontroller and what downsides they have. Also you’ll find out about darlington arrays. Of course there would be small demonstration of controlling different loads at the end of this video. In case if you don’t …